Automatic window sash lock



Aug. 18, 1931. H. E. M ALLISTER AUTOMATIC WINDOW SASH LOCK Filed May 1-9, 1930 Patented Aug. 18,1931

S ES

This "invention relates to new and usefulimprovements in anautomatic window sash lock, i i l I p invention hasfor an object the provision of a device of the class mentioned,

which is of simple durable construction, depeiidablefinuse and ei'licient-in action, and which. can be inamifacture'd and sold at a i'easonable cost Q i l 1 For furthercomprehension of the invention, and "of. the objects and advantages thereof, reference will be'had tothe followh1 1 "description and accompanying drawings, and to the appended claims in which L the various novel features of the invention tr mors particularlylset forth. 7 p In th'e' accompanying drawings forming ajinaterial part, of this disclosure 'F 1g, :1 a fragmentary plan View of an inner and outer, window sashJprovided with the automatic window lock. Q

I 2 is a fragmentary vertical sectional yiewltzilieii on the'line 22 o"l Fig; 1. Figl'3iis an .elevatioiial view as tliough lookingiii the direction of the line 3-3 'Fig. tionalview takenon the line le-lof Fig. 3. a; view similar to Fig. 4 but illustrating a modified form. V p i l The; automatic window sash lock as shown in Figs. 1, 2' and 1, comprises a bracket 10 for attachment on an inner window sash 1'1, (111 12 rotatively mounted on said bracket 10 forengaging and locking in one positionfwith-acatch 13,011 an outer .win dow sash l l ni'eans for urging said cup to lmove into, locked position, a catch 15 for holding the cup in unlocked position, astein '16 swivelly mounted, means on said stenijand catchto cause rotation 01' the stem uponclosing of said window sashes 11 and 14*1'nd' adjustable to anothercondition to cause'fasnialler degree of rotation, means for :45 rotatingsaid stem 16 back to initial condition upon openiiig of the sashes 11 and 14, ajnd means, operated upon full rotation otfsaiid stem 16-t0' trip the catch '15 and V moveit' out of tripped position to allow reim setting of the catch=ahd upon slight rota- 4 is a fragmentary horizontal sec;

PATENT 7 OF FICE rritant McaLLIsTEn, or manmnns HARBOR, sma'rnn ISLAND,- NEW YoRK 1 AUTOMATIC Wmnow sAsH LOCK I J; 1 Application filed. May 19, 19:20. Serial No. 453,610.

tion to trip said catch and keep the catch in the tripped position.

The bracket 10 is provided with side lugs 17 and screws 18fengage through these lugs and into the window sash 11 for accom plishing'the attachment on the sash. The

bracket 10 is also provided with a central raised portion 19 so as to provide a space 20 between this portion and thesash 11. The cup 12 is formed with a flat base 21 resting upon the raised central portion 19 and with an inclined ri1n22 for engaging said catch 13. The cup 12 is rotatable upon a bushing attached on thetop of the raised portion19, A handle '24; projects from one side of the cup 12 for manual Y rotation whenever desired. 'Ih e,. catch 13 is formed with a beakportion 25adapted for engaging over the inclined rin1j22 upon rotation of the cup 12, and with-lug.;por- 7i? tions 26 engaged by the screws 27 engaging in the sash 14 for accomplishing the attachment of the catch upon the sash, The meansfor" urging the cup 12 to move into locked position, that is, the position in which the rim 22 engages'beneath the, beak 25 consists of a flat spring 28 attached at one end upon the bushing 23 and at-the other end upon the flange 22 andarranged so as to normally accomplish the rotation. As viewed iirFig. 1, the spring normally urges I the cup 12 clockwise, The catch 15 for hold ing the cup] in unlatched position consists of a cylinder 30 attached upon the flatibase 21 of'th'e cup and supporting a piston 31 normallyurged downwards by a spring 32 acting betweenthe top oftheLpiston anda plug 33 threaded into the top ofthe cylinder. The piston 31 is provided with a stem 34 engaging through 'an aperturein the bottom of the cylinder and engageable through apertures in the base 21 of the cup and myths raised 19011101119; vWhen all of theselapertures are aligned the stem engages 5 through them and accomplishes the latching of the'cup in the condition shown in Fig. 1. This condition is the unlatched one of the device. The-stem 16 extends" through the bushing 23 so that a portion is disposed within the space 20 and another portion above the bushing 23. i

The means on said stem and catch to cause rotation of the'stem upon closing of the sashes 11 and 14 and adjustable to another condition to cause a smaller degree of rotation consists of a cam 36 on said catch movably supported andadjustable into fixed positions by screw 37. The stem 16 is caused to rotate by a projecting finger 39 from the stem'16 engaging against the cam. In front elevational view the cam 36 is arranged at an inclination as may be seen from an inspection of Fig. 3 so that as the sashes 11 and 14 are moved to their'closed positions the finger 39 will strike against the inclined surface of the cam 36 and cause the stem 16 to rotate through a certain. angular distance. This distance may be adjusted by changing the inclination of the cam 86 as for example indicated by the dot and dash lines 40 in Fig. 3. x g

The means for rotating the stem 16 back into initial condition upon opening of the sashes l1 and 14 consists of a pair of flat springs 41, tensioned against the enlarged square portions 16 of the stem 16 within the space 20. The means operated upon full rotation of said stem 16 to trip the catch 31 and. move out of tripped position to allow resetting of the catch and upon slight rotation'to trip said catch and remain in the trip ed condition consists of a trip bell cran 42 pivotally mounted intermediate its ends at 43 upon the raised portion 19 of the bracket 10 and'so positioned that its front end 44 is in line with the aperture in the raised portion 19 which receives the stem 34 when the latch is in its operative position. The rear end of the bell crank 42 is pivotally connected with a link 45 which is pivotally connected at its other end 46 upon a radial finger '47 attached upon the stem 16.

When the catch. 15 is .in its operative position, the finger'47 is-to one side of a line drawn between the trip 42 and the center of the stem 16. This condition of the device is shown in full lines in Fig. 4. When the stem 16 is caused to rotate upon the closing of the sashes 11 and 14 the finger 47 moves to aposition indicated by dot and dash'lines 48 so as to-be on the line between the center of the stem. 16 and the trip 42. Such motion causes the .link 45 to be moved so as to move the trip 42 toforce the stem 34 upwards and free the catch so that the spring 28 is free to rotate the cup 12 into its latching position- Further rotation of the stem 16 causes the finger 47 to move to a position indicated by the. dot and dash lines 49 in Fig. 4 which is now to the other side of the line drawn between the. trip 42 and the stem 16. The motion of the finger to this latter position is transmitted by the link 45 to move the trip. 42 back into its initial condition so that the catch 15 may again assume its operative position.

For following the operationof the device it is best to first assume the cup. 1.2 to be latched in its inoperative position. Upon closing of the window sashes the finger 39 acts against the inclined surface of the trip 36 so as to cause rotation of the stem 16. As the stem 16turns the finger 47.,moves so as to first cause the trip finger 42 to press the stem 34. upwards for releasing the catch 15 so that the spring 28 turns the cup 12 into its latched condition. The latched condition is the one in which the flange 22 engages beneath the beak 25. As the sashes 11 and 14 assume the completely closed condition, the stem 16 rotates slightly further so that the finger 47 assumes the position indicated by dot and dash lines 49 and the trip finger'42 is moved out from the aperture in the raised portion 19. p

The window sashes are now locked and if the party desires to unlatch' the sashes he may do so by merely manually movingthe cup 12 back into its initial condition so that the plunger 34 en ages within the aperture in the raised portion 19. Now the window sashes are closed, but in unlatched position. In the event that the par using the device wishes to make it impossi 1e for the cup 12v to maintain an unlatched osition while the sashes 11 and 14 are close it is merely necessary to loosen the set screw 38' and adjust the position of the cam 36 so that when. the finger 39 acts against the cam the stem 16 is merely rotated from a position as indicatedby the full lines in Fig. 4 to the position. as indicated by the dot and dash lines 48 in Fig. 4. It will be noticed that the tri finger 42 then maintains its position wit in the aperture in the raised portion 19 so that the catch 15 cannot assume an operativeposition.

In Fig. 5 another form of the invention has been disclosed which differs from the form just described in that in the normal position of the stem 16, the finger 47 is as shown in Fig. 5, that is, it is in such a position that the link 45 is on a line extending from the trip 42 through the axis of the stem 16. The trip 42 is out of engagement and positioned directly beneath the stem 34 of the plunger 31. Another change is that the trip 42 is positioned directly reversed to the trip before described, that is, the rear end of the trip which connect-s with the link 45 is towards the link, as may be seen from an inspection of Fig. 5. An inspection of Figs. 1 and 4 clearly points out that the rear end of the trip 42 is remote from the finger 47 relative to the front end of the trip.

These slight changes change the mode of operation somewhat. Whenthe window sash is closed, the stem 16- is rotated so that the finger 47 moves to the position indicated by cup open.

the dotand l dash lines 49in Fig. 5 so that the trip. iamoves upwards-and trips the stem 34 permitting the spring28 to move thecup 22 soasto latch against the catch 13.; Then upon; complete closing of the window,-the finger 39, from the stem slips off the cam 36 ,so that the springs 41 may returnthe finger iTback' into its original position vin which position. the trip. 42 is out of .theaperture originally-occupied byythe stei1r34. .The window lnow is locked, but if the operator so closed-but not, locked.

While I have shown and described the preferred embodiment of my invention, it is I V to the preciseconstructionherem disclosed to be-understoodthat I donot limit myself and the right isreserved to allic'hangesoand modifications {coming within the scope of the invention as definedintheappended claims.

Having thlisdescribed my invention, What I claim as f'hew, and: desire to securelby United States Letters-Patent is 1 1. An automatic window sash lock, comprising albraeket for attachment on an inner window fsash, a cup rotatively mounted in vsaid bracket for engaging and locking in one position with a catch on an outer window sash"; means for urging said cup to move into locked position, a latch for holding the cupflin unlatched position, a stem swivelly mounted, means on said stem to cause rotation upon closing of said window sashes and adjustable to another condition to cause a smaller degree ofrotation, means for rotating said stem back to initial condition upon j -opening of said sashes, and means operated upon full rotation of said stem to tripsaid latch and move out of tripped position to allow resetting of said latch and upon slight rotation to trip said latch and keep the latch in the tripped position.

2. An automatic window sash lock, comprising a bracketfor attachment on an inner window sash, a cup rotatively mounted in said bracket for engaging and locking in one position with a catch on an" outer window sash, means for urging said cup to move into locked position, a latch'for holding the cup in unlatched position, a stem swivelly mounted, means on said stem to cause rotation upon closing of said window sashes and adjustable to another condition to close a smaller degree of rotation, means for rotating said stem back to initial condition upon opening of said sashes, and means operated upon full rotation of said stem to trip said latch and move out of trippedposition to allow resetting of said latch and upon slight rotation to trip said latchandkeep the latch inthe: tripped posit1on,-sa1dmeans for urgingsaid cup to move into locked position comprising a:- spring having one end attached Zon-thecup and the other end to some stationary part.

--3. An'automatic windowsash "lock, com- I prising a bracket" for attachment-on an inner wmdow sash, acup ;rotat1vely inountedin said bracket foriengaging and locking inone position with a catch oni an. outer window a. sash, means for. .-v.-.urg1ng: "Said cup 'to @move nto locked pojs1t10n, arlatch'forholding the cupaingunlatched position, a stem swivelly mounted, means? on said stem :to: cause-srotation upon closing-of said window-sashes and ad ustable to another condition .to cause a smaller degree of'rotation, means for rotating said stem back to initial condition upon opening of :said sashes, and means operated upon full rotzitionbfsaidstem to trip said latch and move out. of. tripped position" to allow resetting of.- sai d-latch'and :upon -slight rotation: to. trip said latch and keep-the V latch in the trippediposition, said latch for holding the cup inrunlatched position-comprising a'ocylinder. attached uponthe cup andihousing a piston edged downwards by a spring acting between "the piston andga V plug inisaid cylinder-,5 and .arlstem connected with said piston: and engageable through 1 aligned apertures-in; said cap and'said bracket: 4. -An iautomatlc window sash 'lock, comprising a bracket for attachment on an inner.

window sash, a cup. ,rotativelyimounted in said- *bracket for engaging and locking in one position with a catch on an outer window sash, means for urging said cup-to move into locked position,a latch-forholding the cup in unlatched position a" :stem: swivelly mounted, means on said stem to; cause rotation upon closing of said'win'dow sashes and adjustableto. another condition to cause a smaller degree of z rotation, means for rotating said stem backto initial condition upon opening of said 'sashes,*and' means operated-upon full rotation ofasaid' stenr to tripflsaid latchv and move :out of tripped position to allowaresettingof said latch and upon: slightrotation to tripsaidailatch and keep the latch in the tripped position, a bushing being stationary attachedupon said bracket, and said stem engaging through 7 said bushing a 5. An-automat1c w1ndow sash lock, comprlsing a bracket for attachment-on'an 1nner window-sash, a cuprotatively mounted.

in said bracket "for. engaging and'locking in one position with :a catch on an -outer=w1n+ dow sash, means for urging saidpcup to v I move into locked; position, a latch forflholding the cup in unlatched position, a-{stem swivelly mounted, means on said stem to cause rotationupon closing ot said window 5 116 and l st bl -te a o e d t q I to cause'a smaller degree of rotation, means for rotating saidlstem-back to initial condition upon opening ofsaid sashes, and means operated upon full rotation of said stem to trip said latch and more out of tripped positionto allow resetting of said latch and upon slightrotation to trip said latch and keep the latch in. the .tripped-position, a bushing being stationaryattached upon said bracket, and said stem v engaging through said bushing, and-said means for urging'the cup to'move into locked position comprising a stem attached at one: end on said bushing and at the other'end of said cup-v 6.-An automatic window sashl'ock, comprising a bracket foratta chment on an vinner window sash,.aicup -rotatively mounted insaid. bracket foriengaging and locking in one position with *a catch'oiran outer window sash, means forurging said cup-to move into locked position, -a latch.for holding the cup in unlatched positionya stem swivelly mounted, means on said stem tocause rotation upon closing Fof'said: window sashes and adjustable to another' condition. to cause a smaller degree d of. rotatiomsmeans for ro,- tating said-stemxback to initial condition upon. opening of said sashes, and means operated upon fullcrotationof said stem toitrip said. latchandtmove ontiof tripped position to allow resetting ofsaid 'latch and upon slight rotation to trip said latch and 'keep the latch in the tripped position, the means on said stem'to'canse'rotation comprising a cam adjustably'mounted upon said stem and engageable bya finger rojecting from: the catchon said outer win ow sash; 7'

.7. An automatic window sash lock, comprising a bracket for-attachment on an inner window ash, a cuprotatively mounted in said bracket for engaging and locking in one position with a catch on an outer window sash, meansfor urging said cup-1 to move into locked. position, a latch for holding the cup in unlatched position, azstem swivelly mounted, means" on said-stem :to cause rotation upon closing. of saidwindow sashes and adjustable to another condition to cause a smaller degree of rotation, means for rotating said stem back to-initial condition upon opening of said sashes, andtmeans operated upon full rotation of said stem. to trip-said latch and move out of tripped posi tion to allow resetting of said: latch and upon slightrotation to trip said latch and keep the latch in the tripped position, said means for rotating said stem backZi-nto initial condition upon opening of said sashes comprising a spring acting between said stem'andsomestationary part. H

' 8.- An automatic-windowsash lock, comprising a bracket'for attachment on an "inner window sash, acup' rotatively mounted in said bracket for engaging and locking in one position with a: catch on an outer to move 'into'locked position', a-latch for holding the" cup y'in unlatched position," a

stem swivelly mounted,; means" on 'said stein 'to cause" rotation upon closing of saidwin 70 'dow jsash'es and 1 ad]ustable to another condition to cause a smaller degree of rotation, means for rotating said stem-"back to initial condition upon openingof-said sashes; and means-operatedmpon full-rotation of: said 15 'stem to trip said latch-' and move' out of tripped position to allow resetting of 1 said latchjand upon slight" rotation to trip {said latch and keep the latch in the tripped posi tion, comprisinga trip 'be'll crank pivota-lgly mount-ed inter-mediate ofitsends and an ranged so that its front end'is engageable for releasing said latch," a-link connected with the rear endof said'trip bell crank, and-a radial-finger fixed on said stem and connected with said link so that in normal position said radial finger is located to one side of a line extended between said trip and said stem and u n" rotation of the mm toassumei'a position on said lineor toithe Other-side of said'line p,

In testimony whereof: I have afiixe'd my signature. a Y HARRY E; LICALLISTER. 

